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Sentence

幕ばく末まつ、日本にほんは港みなとを開ひらくことになった。

Span Details

幕ばく末まつ、

Bakumatsu period; end of the Edo period; final years of the Tokugawa shogunate

日本にほん

は

topic marker

grammar

open ports or borders

ことになった。

it has been decided that; it has been arranged that; it turns out that; the result is that; it means that; it is equivalent to

-> ことになるexpression, verb